Charger shell jarring refers to the surface of the plastic shell near its gate, with the gate as the center to form a dense ripple. The reason is that when the melt viscosity is too large and the mold is filled in the form of stagnant flow, the front end of the material will soon condense and shrink as soon as it touches the surface of the cavity, and the later molten material will expand the cold material that has shrunk and continue to advance.
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solution
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(1) Increase the barrel temperature, especially the nozzle temperature, and also increase the mold temperature.
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(2) The shell manufacturer increases the injection pressure and speed during production, so that it quickly fills the model cavity.
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(3) Improve the size of the runner and gate to prevent excessive resistance.
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(4) Mold exhaust should be good, and a sufficiently large cold feed well should be set up.
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(5) The charger shell should not be designed too thin.
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Plastic charger shell swelling and bubbling, the charger shell after molding, soon on the back of the metal insert or in a particularly thick part of the swelling or bubbling. This is caused by the expansion of the gas released by the internal pressure of the plastic which has not been completely cooled and hardened.
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solution
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1. Effective cooling. Reduce mold temperature, extend mold opening time, reduce material drying and processing temperature.
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2. Reduce the filling speed, reduce the forming cycle, reduce the flow resistance.
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3. Increase the holding pressure and time.
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4. Improve the situation that the wall of the charger shell is too thick or the thickness changes.
After charging treasure drum up, it is recommended not to use. Further use may cause short circuit, heat, smoke, burning, explosion and other unimaginable consequences, so we need to buy or replace a new charger or charging bank;
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Use the original charger or charging treasure, the parameters are not the same charger and charging treasure, the use is very dangerous, if the use process inadvertently fell the charging treasure, will cause strong vibration of the charging treasure;
Charger bulge should pick up the built-in fan is damaged, do not blow is changed should be replaced by a new charger can also change the fan.
The other is whether the place you charge is ventilated, the temperature of the indoor charging area is too high and the temperature of the charger will make the charger heat and bulge, you should deal with it according to the actual situation.